import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.*;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

public class demo3 {
    public static void main(String[] args) throws ParserConfigurationException, IOException, SAXException, TransformerException {
        DocumentBuilderFactory dbf=DocumentBuilderFactory.newDefaultInstance();
        DocumentBuilder db=dbf.newDocumentBuilder();
        Document doc=db.parse("src/demo.xml");

        Element brandElement=doc.createElement("Brand");
        brandElement.setAttribute("name","三星");

        Element typeElement=doc.createElement("Type");
        typeElement.setAttribute("name","Notex");

        brandElement.appendChild(typeElement);
        Element phoneElement= (Element) doc.getElementsByTagName("PhoneInfo").item(0);
        phoneElement.appendChild(brandElement);

        TransformerFactory transformerFactory=TransformerFactory.newInstance();
        Transformer transformer=transformerFactory.newTransformer();
        DOMSource domSource=new DOMSource(doc);

        transformer.setOutputProperty(OutputKeys.ENCODING,"gb2312");
        StreamResult result=new StreamResult(
                new FileOutputStream("src/demo.xml"));
        transformer.transform(domSource,result);

        NodeList list=doc.getElementsByTagName("Brand");
        for (int i=0;i<list.getLength();i++){
            Element brandElements= (Element) list.item(i);
            String brandName=brandElement.getAttribute("naem");
            if (brandName.equals("三星")){
                brandElements.setAttribute("name","SAMSUNG");
            }
        }
    }
}
